抄表器的正确关机方法有（）。
A、按[关机]键关机；
B、远方关机；
C、回到主控台关机；
D、强行去除电源关机。
参考答案：A, C
He has recently ____ tennis to relax himself in his spare time.[ ]
A. taken down
B. taken up
C. taken in
D. taken on
上钻台丈量方入时应戴（）。
